Internal grinder



July 19 1927' o. nkmsEY INTERNAL GRINDER Filed June 20, 1925 2 Sheets-Sheet 1 I i I Il July 19,1927. QUKINSEY l `1636 37 INTERNAL GRINDER Filed June 20, 1925 2 Sheets-Sheet 2 rufenm.

, v 'Patented -.luly ,19,

UNITED STATES liiirraiai orifice.-

-ownnn manif, oir wspwn'rosn, wisconsin.

caminan.

Appiimion nica- Jane so, im. serial in. sans,

My invention 4im for its' objets thel pn vision of what may be termed a portable precision grinder for grindingthe internal cylindrical surfaces orbores ofqcylinderslorl 5 valves, whereby the grinding operation may 4be speedily and accurately performed and anl` inappreciable amount of stock rremoved.

. Another object of my invention is to pro-'- v' vide a portable grinder whereby the opentlo ing medium or exhaust air will be directed toward the-work and employed' for blowing the ground material away from the grinding wheel to prevent loading of said wheel.

A further objectl of the invention is to pro i5 vide means whereby the. movable cylinders or spindles will be 'completely encased or housed; and wherein'the driving ears ma' 1 .be easily controlled so as to provi e a quie freturn of the mechanism to normal position. '20 Another objecty of the invention is to ,pro-

vide means, cooperating with the housing of the grinder, whereby an accurate and true centering of the grinder relative to the bore f of the cylinder to be' ground may be quickly 25 and .easily mechanically determined without the requirement of special skill.

The above enumerated advantages and obyjects of my invention will all be more fully comprehended and understood from the de-` 30 tailed description of the accompanying draw-- ings, wherein: Figure 1 is a longitudinal sectionalview vof ',iny improved grinder shown' applied to the end of a. cylinder of which only a por- 3: tion is' shownin section.

` `Figure 2 is a detail sectional view of -a portion ofthe inner cylinder and the rotor.

` Figure Sis a cross sectional view taken on theline 3 -3 of Figure 1 looking in the di. 40 rection' of the arrows. i

f Figure 4 isa detail elevation and partial sectional view of my improved centering mechanism shown applied to the end of a cyinder of which only a portion isv shown.' 45 i of the elements of thecenteringmechanism which is adapted to be securedvto the cylinyder to be ground and which receives the lower end of the housing ofthe grinder.

' My invention relates to an 'internal grindel` especially adapted for the grinding or truing A of an internal Vcylindrical surface and particularly for' use in connection with the .tru-

,ing'or grinding of the internal surface of.

55 what are known as triple valves employed .particular exempli cation, lconsists of lan an- ,the tapered opening 13 and-'with a 'second 'series of openings 17 .also arranged concenmember 11.. The centeringmechanism also comprises a centering plug member .20-(see f gure 5 is a detail perspective view'of one i diameter of the valve so 'as to permit of de- 22,' .see

tries a ,split on freight and passenger cars and formingA I' part of the air-brake equipment; as well as for the grinding-of what .are known as vdlis- .l

tributing valves on locomotives.'

These valves, jin practice, are usually brass or bronze lined as shown at 10 in Figure 1 where a portion of the valve is shown at 1 1. In the operationl of grinding, itis essen-v tial, as the first step'in the operation, to provide means whereb the grinder will be properly centered re ative to theaxis of the valve or bore ofthe cylindrical device which 7 is -to be groundythis step or operation bein 1 accomplished by.. -means of my- ,'improve composite centerin Vmechanism which, in the Aopening as shown in Figure 5. The annular member 12 is also shown'vprovidedlwith l a series of holes lrarranged concentricfwith f tric with the tapered opening 13 but atlv a shorter radius from thecenter) t us pro.- viding two radii to' take carev of triple'valve. flanges of different diameters'. The holes `16 and 17 are intended `to receive bolts 18, see

{igpre 4, which are provided at bottom with 'I aped-lieads 19 adapted to en .age be neath the flange of the. valve or cy indrical Figurev 4) whichis provided with an external taper corresponding with the taper 0f the opening 13 in the annular member'k12; and this plu 20 is provided with asikirt.` portion 21 wiich` is intended to'entsr the valve 11; the skirt portion being of slightly 'd less external diameter' than the .internal sired adjustment'. The plug member"20 in 105 turn is rovided with a plug sleeve member,`

igure 4, thelower end whereof has anvv external bevel orV cone formation terminatingin a small ,lip as shown at 23' and cardevice.

vper end of the plugV sleeve 22 (which extends through a plug member 20) is externaly threaded to receive the plug sleeve nut 25.

n practice, theannular member 12 is placed on'thel flange of the triple valve with the bolts 18 out of holding position; the plug member 20 is, then inserted into annnular member 12 and fastened thereonby any suitable locking device as for example the locking cams 14, 14; The plug sleeve n'utor internally threaded cap 25 is then rotated and, by reason of. its relation with the plug member 20, will cause thel lug` sleeve 22 to be drawn upwardly, there y causing the cone surface 23 thereof to expand the ring 24'into rm gripping relation with the internal surface of thetriple valve or other cylindrical This action vcauses the composite centering mechanism to be accurately ad- 'usted or centered, at which time the L-head olts 18 are turned into firm clamping relation with the ange of the triple Ivalve 11. The annular member 12 is also provided '2' with set-screws 26 which may now be turned or screwed inwardly so as to prevent any accidental shifting set-.screws also permitting of closer adjustment being made when found necessary.

With the annular member 12 having thus firmly been secured to the flange of the triple valve, that is to sa ,the member 12 having been laced in a solute concentric relation with t e axis of the triple valve, the

lug sleeve-nut 25 is unscrewed, thereby rey easing plug sleeve member22 and its expansion ring. 24. This permits the plug 20 with the sleeve 22 'to be removed from the triple valve while the annular member 12 reinains in place, concentric with the triple valve or other cylindrical element.4

The grinder consists of a suitable housing 2T; the base whereof is provided with a taper at 28 similar to the taper of plug 20 and therefore corresponding with the tapered orice 13 0f member 12. 1 The tapered portion 28 of the casing 27 is inserted in the annular member 12, after the plug 2O of the centering mechanism has been removed, and is secured in place onthe' member 12. by the cam members 14,14, or any other suitable Vclamping mechanism.

By reason of the member 12 of the centerling mechanism havingpreviously been centered, the grinder housing 27 is, therefore,

held intrue concentric Vrelation with the bore of the triple valve. grinder housing 4or shell 27 1sv preferably shown provided with a number of openings at 29 to' permit observation of the grinderwheel v30 during grinding operation. The

" grinding-wheel 30, which is of well known type, is suitably and removably secured to the lower end of the turbine or rotor spindle 31 of the turbine or rotor 32. The rotor 32 comprises a cylinder provided with a pluof the member 12; the

The). base of the rality \of longitudinal slots, for example three in number, in each of which is secured or placed a loosely held movable blade member 33 which is free to move in and out 'radially to follow an eccentric circle. The turbine or rotor 32 is mounted in a cylinder' or tube 34 eccentrically, with one side in snug'relation with the wall of the cylinder. This side of the cylinder is provided with an air passage 35 which communicates with the ports 36 leading into the interior of the cylinder or tubing, namel into the chamber in which the rotor 32 is ocated, (see Figure 2; while the other end of the passage 35 communicates with the chamber 37 which receives the compressed air supply fromlv graduated dial 42 keyed wheel 43 also keyed thereto so as to permit rotation of the entire assembly withinthe outer spindle 41Aand thereby throw or move the grinding wheel in and out to conform to cylinders of different diameters. As the rotor 32 (to the spindle whereof grinder 30 is secured) is mounted eccentrically in the turbine cylinder 34, it is evident thatrotation of the entire turbine assembly, by rotation of hand-wheel 43, will cause the grinder wheel 30 to be moved through an'eccentric and thus bring the grinding wheel 30 against the walls of the cylinder tobe ground.

The air entering through ports 36 into cylinder or tubing 34 impinges against the blades 33 (the latter being, by centrifugal force moved outwardly into contact with the inner wall of the tube 34) causes the rotor 32 to be revolved; the air being permitted to escape throughl outlet ports 44. The bearing housing 40 contains a race-way for the ballarings, indicated at 45, for the trunnion of the rotor 32 and also provides a closure for the end ofthe cylinder or tubing 34. The bearing housing 40 is bored eccentrically as shown in' -Figure 2 so as to hold the rotor 32 in the eccentric relation vpreviously described. The tube 34 at the lower end/is also provided with a bearing housing 46 which likewise is eccentrically bored to receive the spindle 31'of the rotor and also to receive the ball-bearings shown at 47 and4 47, and

'to maintain rotor 32 in the eccentric -position main spindle41.

' race-way. 0f ball-bearing 47'* l(which is immatic take-up or all freedom and Wear in the bearings is provided.

- Hand-crank 49 has a gear 50 keyed there-v to which is in lmesh with a gear 51 which is threaded onto the threaded cylinder or outer main spindle 41. Rotation of handle 49 and therefore of pinion 50 will rotate gear 51 and byreason of its threaded relation with j (through 53 spindle 41 4causes the latter to travel either upwardly or downwardly,- depending, upon the direction of rotation of handle v49. The

object of this arrangement is to provide a quick return movement of the grinding wheel after it has reached th'e maximumpoint of its downward stroke. This feature or o eration also is used for truing the grin ing wheel with a diamond when necessary. The lower end of crank'49 is .shown reduced and passes through the pimbn 50 and also through a pinion 52which turn .i

meshes with a gear 53 which has sliding or feathered relation with the cylinder orouter li'. i

The ratio between pinion 52 -and gear 53 is 2-to-1, whereas the ratio' between pinion 50 and gear 51 is slightly greater than 2-to-1, in order that a desired4 feed of the main spindle 41 may be had. The pinion 52 is pro- Avided with a hub or extension 54, which extends through the .extension of the main casing or housing; the lower end of thel hub being threaded to'receive a nut 55 on which a` handle 56 is trunnioned in any suitable manner. The lower end ofthe crank 49 extends through the hub 54 of pinion 52 and has a stop-nut 57 fixedlysecured thereto by means of pin 58. The distance between the lower surface of the casing extension and the stop-nut 57 ,is slightly greater than the thickness of nut 55 so that'the latter may have slightltravel lengthwise of the hub 54'of pinion 52. Asis apparent from thev lconstruction shown, when nut- 55 is rotated by means of handle 56 so as lto screw the-nut 55 up against the bottom surface of the cas- .ing extension, vpinion 52 'will be locked against rotation andthe pinion 52 in turn locks gear .53 and prevents its rotation,

which results in preventing rotation of'main s indle' 41. 'If the crank 49 is rotated under t ese conditions, pinion 50 will rotate gear .51 and cause the mainspindle 41 to travel upwardly or downwardly depending upon the direction offrotation of crank 49; al-

ways moving the spindle 41 a distance equal'- r' to the pitch of the thread on spindle 412 thus serving as a .quick return .or quick longitudinal movement of the main spindle and the into contact with lock-nut 57, it is evident that pinion 52 will be forced upwardly into firm contact or-clampingrelation with pinion 50, so that pinion 52 will of necessity rotate with pinion 50. With this condition, rotation of crank 49 will not only induce `main s indle 41 to be fed downwardly7 (throng the medium of pinion 50 and gear 51), but will also cause the main spindle 41 to be rotated, induced through rotation of pinion 52 and gear 53.

This causes main spindle 41 to revolve the medium of pinion 52 and gear and lwhile this is taking place gear 51, due to the di'er'ence in the number of teeth, will induce a gain or loss will act on the screw-threads of main'spindle 41 and cause the main spin- .dle 41 to be fed 'upwardly ordownwardly according to the differential In order to protect the main spindle 41 at its upper threaded end, I have shown a telescoplc housing comprising a plurality of different sized sections 59, each having inturned flanges atl top andout-turned flanges sectionsu expanding as the spindle 41is re-Uv turned upwardly.

`I also Y dle 41 with a suitable dust guard, which is .preferably in the nature' of suitable fabric or leather arranged in bellows-folds vas yshown at'62; one'end whereof is secured to the main casing 27 in any suitable manner, asl for example by means'of suitable concentric rin asat 63 which are forced into the counter ore of housing 27; while the other end is securedto 'a ring 64 which is free to rotate on the lowerend of themain spindle 41 in order that the ring- 64 with the dustguard velement62will not rotate -With the main spindle 41,'1buton-theotherhand beca'used to fold orbe extended; depending on directionof traveliof the spindle, with the result that the lower end of operating "spin-p dle during operation is enclosed .and protected and ingress of' dust or other foreign matter prevented.

gaining or losing effect; this provide the lower endofthe spinaction and the direction of operation of crank 49.`

loi)

The air exhausting .from .rotor nr turbine` I c linder 34 through exhaust ports44, enters t el main spindle 41 and acts as a vvcooling medium for the turbine' assembly; and this I exhaust air in turn is permitted to exhaust from, the main-spindle 41 through .the exhaust ports shown at 65, which are prefer- I ably -41 rotates through operation of hand-crank arranged in asuitable closure bushing or member at the lower end ofthe main spindle. hausting air will also blow the ground partie'les out of the cylinder away from the oper-v ating pomt; the bushing with ports 65,. at the same time serving to -hold the motor assembly eccentrically 1n the mainsspindle 41;

49, it is apparent that the motor assemblyjis caused to move through an orbit, bringing l the grinding wheelsuccessively into contact with theentire interior surface of. the

cylinder tobe ground.. The bushings which hold the m'otor eccentrically in the spindle tated to zero, the

describe a small orbit when the rotor is put4 .41 permit the motor assembly to be thrown into and--outof operative contact with the inner walls 'of the cylinder to be ground through proper rotation of hand-wheel 43.r

For example, with the dial 42 set or rol grinder wheel 30 will be approximately at t e longitudinal center or axis oftheV assembled device and Will merely into operation; on the other hand, when hand-wheel`43 is turned so as to move dial 42 to 180 degrees, the grinder-wheel 30 is moved out from center 'and intoycontact with one Vside o f the cylinder wall and when the rotor .I 1 Atravelthrough 3 VWith this arrangement, adjustment of the is in operation, the grinder wheel 30 will not only spin or rotate but will also beA caused to an orbit definedv by the' cylinder interior. l

grinder wheel 30, relative to the inner wall of the cylinder, when .the wheel -becomes worn, is permitted.

- with a sleeve 67 which is provide v .The compressed air line 38l is valve 68 which seats atl thev lower end of l housing 69, arranged in the extension 39 of cylinder or tube 34, and lprevents the egress of air upwardly throughthe u the device; air pressure being-be ow valve 68 maintains it on `its seat. The lower end -of4 l .strainer 70.

movement with the main spindle,"I provide' the sleeve 67is shown' rovided withy an air As thel air-line 38 must have a yielding support for the airj-line 38 in the y 'form of a` yoke or strap member 71, which is secured on the housing extension ,or hub.

' '44 are. preferably arrangedin the V-shape andV Abeneath a fia-nge- 72 on the hand- 'oo crank 49.

` As'shown in Figure. 1', the exhaust ports ,l formation so as to permit of suiiicient exhaust and to prevent back ressure in front of the blades 33 and'there ore prevent back ,pressure against With this arrangement, Vthe ex-.

vtatab e movements. per end of y tlierotation of the rotor 32, Y' l as such pressure would diminish power on the vopposite sides of the blades and reduce the driving power of the rotor.

VThe rotor 32 is l extending entirel therethrough as well as through its spin .le 31, as shown at 73,"see Figure 2, for the purpose of permitting introduction of grease, which may be done by the use of a Well knownv grease un; the grease being introduced through t e lower end of the passage taining screwv73 (which retains thel grind-` ing wheel 30 on lthe endof the spindle 31,)7; the grease passing u through passage 3 and'thence out throu'g inthe spindles of therotor and in the collars 75,75 arranged above and below the rotor; thus allowing the grease to fill the cavities about the collars 75 and to pass into the"ball bearing raceways45 and 47 at both ends of the rotor. The collars 75, 75 not only serve as' thrust collars for the ends of the rotor, but also provide closures for the.

endsof the. slots inl the rotor in .which the blades 33 are mounted. s l

By providing. the ports 65 in the bushing provided with a passage 73 upon removing the re-v the ports7 4 provided at vthelower end of the main spindle or cylin` der 41, the air, exhausting through ports 44 e- 34, is di-q rected downwardly toward the grinder wheel' from the inner cylinder or spind and the exhausta1r thus employed for blow'- ing thel ground material from the grinding wheel and thus prevents what is termed as loadinv that isto say, the material is premoi" of metal woul cause thef lat-l In the lower end 'ofthe main telescopic housing at the upper end of the main spindle 41 andthe bellows-folds 62 at the lower end of the spindle provide protection for the s indle' andprevent particles'of metal vor ot erforeign matter becoming lodged on the main spindle and thus intererin with 'its proper longitudinal and ro- My invention provides a light.l ortable y true accurate grindin' surface ma be obtained in la minimum amount of time; truingof the cylinder being accomplished without appreciably enlarging l'115' lfr-rin'der which is highly sensitive an where'- of a cylindrical" the kbore because the grinder removes the least amount of stock 4and as a result the life of the triple valve, for which my With my improved precisiongrinder, as requiredan air-brake work', the use of high' Y' time the necessity or skilled operators is obinder f 1s especially adapted, is greatly en anced;

viated as the proper setting or truing location of the grinder is all automatically or mechanically accomplished, any wear in the bearings for the rotor portion of the grinder Vbeing automatically taken care of by the means hereinbet'ore described, so that possibility of vibration or` chatter is elimina-ted.

The second or inner cylinder 34 iseccentrically mounted in the main cylinder 41 by means of the bushings at the upper and lower ends thereof; and the rotor 32 is eccentrically mounted in the second lcylinder by means of the bearing housings and 46 which are immovably secured within the second cylinder.4 The housing 46 just referred to is provided at its lower end with a grease retaining element 76 which is held in place by means of the collar 77 secured in the lower end 'of the housing 46 of inner cylinder 34; and the main housing 27 is preferably provided with suitable bushing as at 78 to receive the main cylinder 41. With the inner cylinder 34 and the rotor eccentrically mounted as shown, it is apparent that the grinding wheelBO, when the device has been adjusted so as to bring| the grinding wheel into contact with the wall of the cylinder or valve to be ground, will, in addition to its rotation about its own axis, move through an orbit and therefore into contact with the entire inner wall of the cylinder or valve operated on; the operation being' visible through the openings 29 in the base of the main housing.

I have shown what I believe to be a simple exemplication of the invention, which is especially adapted for precision grindin as required in connection with the triple va ves employed in air-brake equipment and have described the same in terms employed merely as terms of description and not as terms of limitation, as structural modifications arey possible and may be made without, however, departing from the spirit of my invention.

What I claim is j l 1. A grinder of the character, described, comprising a main housing, a main cylinder longitudinally and rotatably movable in said housing, said cylinder being externally threaded, a second cylinder mounted in the main cylinder, closure means for the ends of the malin cylinder whereby the position of the second cylinder relative to the longitudinal axis of the main cylinder is maintained, means whereby said position of the second cylinder may be regulated, intermeshing gear mechanism operatively connected with said main cylinder with va portion of sai-d gear mechanism slidably connected to said second cylinder, whereby either longitudinal movement or longitudinal and rotatable movement of said cylinder may be obtained, and means for controlling said gear mechanism.

2. A grinder of the character described.

comprising a' main housing provided with an-extension or hub on one side thereof, a main cylinder longitudinally and rotatably movable in said housing, said cylinder being externally threaded, a second cylinder mounted in said main cylinder to move with said main cylinder, closuremembers for the ends of the main cylinder whereby thesecond mentioned cylinder is eccentrically held in the main cylinder, means whereby the position of the second mentioned cylinder within the main c linder relative to the axis of the latter may e regulated, intermeshing gear mechanism operatively connected with said main cylinder Withone portion of the mechanism having a slidable operative relation with said cylinder whereby either longitudinal movement or longitudinal and roytatable movement of said cylinder may be obtained, means for locking a portion of said gear mechanism against rotation, and means, mounted in the housing extension or hub whereby said rotated.

3. A grinder of the character described, comprising a main housin provided with openings in the side walls jacent the lower end thereof, a main cylinder longitudinally and rotatably movable in said housing, said cylinder being'externally threaded at its upper end, a second cylinder eccentrically mounted in said main cylinder, closuremeans for the ends of the main cylinder whereby gear mechanism may be j the second mentioned cylinder is eccentricall 1y held Within the main cylinder, means secured tothe upper ends of the cylinders whereby the positionof the second cylinder relative to the axis of the first mentioned cylinder may be controlled, gear mechanism 'for controlling the first cylinder consisting of two pairs of intermeshing ears arranged in parallel relation one pair a ove the other, the ratio of one pair of intermeshing gears being somewhat greater than the ratio. of the other pair of meshin gears, the gear of one pair having threaded rela-tion with the threaded portion of the main` cylinder while one of the gears of the second pair has a feathered relaltion with said main cylinder, means whereby said gears may be rotated, and means whereby a gear of one of said pair of gears may be placed into operative relation with a gear' of the other pair or be locked against rotative movement.

4. A grinder of the character described, comprising a main housing, a main cylinder longitudinally and rotatably movable in said housing, said cylinder being externally threaded at its upperend, a second cylinder eccentrically mounted in the first mentioned cylinder and provided with a spindle disposed through the upper end of the first cylinder, closure means for the ends of the first cylinder whereby the second cylinder is eccentrically held in Qlace,means secured to the'spindle of the second cylinder where-V byits position in the first cylinder may ,be controlled, geafr mechanism mounted in said housing and arrandged in pairs, a gear of onel pair having threa ed relation with themain cylinder while a gear of the second pair has featheredI relation with said cylinder, a hand-4 crank for operating the other gear of each pair, means wherely said' other gear, of one pair may be locke to a gear of the other pair so as to rotate therewith or to be locked against rotation, telescopic means inter-l mediate of the housing and the upper end of the main cylinder for enclosing the latter,

, pairs of intermeshing gears arranged one above the other, threaded relation with said main cylinder, while the gear of the other pair has feathered relation with said cylinder, a handcrank rotatably mounted in the hub extension of said housing with a gear of one of said pair of gears keyed thereto while a gear of the second pair is loosely mounted thereon, and clamping means secured to the lower end of sa1d loosely mounted gear whereby said last mentioned 'gear may' be clamped to the gear keyed to said handcrank to rotate therewith or locked to said housing against rotation. i f

6. In a grinder of the character described, a main housing, a main c linder externally threaded and longitudine ly and rotatably movable in the housing, a second Vcylinder eccent-rically mounted within the main cylinder, means for controllin the position of the second cylinder in sai main cylinder, two pairs o .inter-meshing gears arranged one above the other, the gear of one pair having threaded relation with the threaded.

portion ofthe main cylinder while a gear of the second pair is feathered on-said cylinder, a hand-crank mounted in said housing with a gear of one pair keyed thereto while the gear of the other pair is loosely mounted thereon and is provided with an extension or hub disposed through the housing, a clamping nut threaded on the extension or hub of said gear, an operating handle swiveled on said clamping nut, and a stop-nut secured to the in the main cylinder, two

the gear of one pair having said cylindricalmember,

lower end of said hand-crank and beneath said clamping nut. .7 In a grinder of the character described,

a main housing provided with a. base portion' having an external taper, a main cylinder externally threaded and longitudinallyand rotatably movable in the housing, a second cylinder eccentrically mounted in the main in the main cylinder maybe controlled, a

.plurality of gears mounted in the housing,

one of the gears having threaded relation with the threaded ortion of the main c llinder while a second) gear has feathered re ation with said cylinder, a hand-crank, rotatably mounted in the housing, to which a third gear is keyed while a fourth gear is loosely mounted thereon, ,clamping mechanism operatively secured to the last inentioned gear whereby said gear may be' made to rotate with the third mentioned gear or be locked against rotation, collapsible means secured to the housing and to both ends of the main cylinder whereby the ends of the latter are enclosed.

8. In a grinder of the character described, an elongated housing having a -lateral extension on one side, a cylindrical member slidable in said housing and externally threaded, two pairs of gearsarranged one pair'above the other, the ratio of the of one pair being greater than that of gears of the other pair, being threaded -on the the threaded portion of while a gear of the second pair is feathered on said cylindrical member, a hand-crank rotatably mounted in said lateral extension of the housing, the second gear of said first mentioned pair being keyed to said hand-crank while the second gear of the other pair is loosely `mounted on said hand-crank, said last mentioned gear being provided with an extended hub disposed through the lateral extension of the housing and externally threaded, a stopcollar secured to the lower end ofthe handcrank, a end of the extended hub of said last mentioned gear and adapted to abut against the h ousing or said stop collar, and an operating OWEN D. KIN SEY.

gears.

msl

the gear of one pair.l ,f

clamp-nut threaded on the threaded 

